Macurco, Gas Detectors, models:

6 Series	Installation Manual
CD Series	User Instructions
CD-6H	User Instructions
CM-12	User Instructions
GD-12	Operation Manual
GD-2A	Installation & Operation Manual
GD-2B	User Instructions
GD-6	User Instructions Operation Manual
HD-11	User Instructions
ND-2	Manual
RD-12	User Instructions
TX-6-AM	User Instructions
TX-6-HS	User Instructions
TX-6-ND	User Instructions